Productivity formulas of horizontal well used to predict the productivity of conventional horizontal well have been developed in gas reservoirs with closed bottom and top boundaries and with supply boundaries.
In the ANSYS finite element software, the tool border conditions in actual working status are more accurate simulated by the artificial settings, and the stresses and deformation states are calculated in every condition.
The survey and research is based on Urumqi in Xinjiang and the area of HongliuRiver which is at the border of Xin-Gan. It vias Miquan City, the Urumqi City, TurpanCity, Shanshan County, Hami City, about 787km.
By analysing the process about formation eroding,this paper bluids up the mathematics mode of rock eroding, and gives some specific formulas for formation effected by injection water, carbon dioxide, production chemistry agents on border conditions.